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Finding the Fourth Proportional to 90,440.80, 124,664.46 and 71,289.52

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Solution

The fourth proportional to 90,440.80, 124,664.46 and 71,289.52 is: 98,266.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,440.80 : 124,664.46 = 71,289.52 : x
  2. Step 2: Convert to fraction form
    90,440.80/124,664.46 = 71,289.52/x
  3. Step 3: Cross multiply
    90,440.80x = 124,664.46 × 71,289.52
  4. Step 4: Simplify right side
    90,440.80x = 8,887,269,514.46
  5. Step 5: Solve for x
    x = 8,887,269,514.46/90,440.80
  6. Step 6: Final answer
    x = 98,266.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.